Cleaning method of water-cooled screw chiller

The cleaning method of the water-cooled screw chiller includes power off and shutdown of the chiller, cleaning of the condenser and cooling tower, cleaning of the screw compressor, inspection of pipes and valves,emptying of residual moisture, inspection of the electrical system, re-powering and running tests. The cleaning unit needs to be operated carefully, and the operating instructions and safety regulations of the unit should be followed.It is recommended to ask professional and technical personnel to clean it. Proper cleaning can remove dirt, promote the recovery of unit performance and improve the efficiency of the unit.

water-cooled screw chillers need to pay attention to the following steps when cleaning:

1. De-energize and shut down the chiller: First, make sure the chiller is de-energized and the water and steam supplies are turned off.

2. Clean the condenser: Remove dust and dirt from the surface of the condenser. Cleaning can be done with tools such as brushes or compressed air.

3.Clean the screw compressor: use a special cleaning agent mixed with water, inject the cleaning liquid into the screw compressor,run it for a few minutes, and then drain the cleaning liquid. Repeat this step until the cleaning fluid drains out. Make sure that the cleaning fluid is completely drained to avoid remaining inside the unit.

4. Clean the cooling tower: Remove dust and dirt from the inside of the cooling tower. Can be cleaned with compressed air or water flushing.

5. Check pipes and valves: Check the pipes and valves of the chiller for blockage or leakage. If there is a problem, repair or replace it in time.

6.Empty: Empty the residual water in the chiller.

7. Check the electrical system: Check whether the electrical system of the chiller is normal. If there are damaged or aging parts, they need to be repaired or replaced.

8. Power on and run test: Power on the chiller again and run a test to ensure normal operation.

In addition, the water-cooled screw chiller will scale after running for a period of time, causing the unit to alarm at high pressure. In normal applications, water-cooled screw chillers need to be cleaned regularly. In general, cleaning is divided into two types, physical cleaning and chemical cleaning. Chemical cleaning is to use acid cleaning, also known as pickling, to use drugs to clean the heat exchanger. The "acid" mentioned here is not sulfuric acid, hydrochloric acid and other acids, but a special cleaning agent. In chemical cleaning, it is necessary to consider the degree of dilution of the acid and the type of acid. Basically, almost all condensers can be cleaned by pickling.

In addition, you also need to consider the parts of the chiller you want to clean, whether it is a certain part or the cyclic cleaning and cleaning of the entire system, these two aspects are completely different. If it is cleaning and cleaning in a cycle, it is necessary to ensure that the system is completely closed, and the cleaning pump, the liquid distribution tank, and the relevant valves of the refrigerator are connected.
If it is cleaned separately, the condenser must be removed, and then the diluted acid solution must be added to it, and it must be filled up to achieve the corresponding cleaning effect.

The above is the cleaning method of the water-cooled screw chiller. It is necessary to read the instruction manual of the chiller carefully before cleaning, and follow the relevant operating and safety regulations. In addition, if you are not sure about the cleaning operation, it is recommended to ask professional technicians to clean it.